--- gforth/float.fs	2012/05/26 10:20:01	1.65
+++ gforth/float.fs	2012/12/31 15:25:18	1.68
@@ -1,6 +1,6 @@
 \ High level floating point                            14jan94py
 
-\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007,2009,2010,2011 Free Software Foundation, Inc.
+\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007,2009,2010,2011,2012 Free Software Foundation, Inc.
 
 \ This file is part of Gforth.
 
@@ -131,9 +131,23 @@ DOES> ( -- r )
 [IFDEF] fp-char
 : sfnumber ( c-addr u -- r true | false )
     fp-char @ >float1 ;
+
+Create si-prefixes ," PTGMk munpf"
+si-prefixes count bl scan drop Constant zero-exp
+
+: prefix-number ( c-addr u -- r true | false )
+    si-prefixes count bounds DO
+	2dup I c@ scan nip dup 0<> IF
+	    1 = IF  1- fp-char @  ELSE  I c@  THEN
+	    >float1
+	    dup IF  1000 s>f zero-exp I - s>f f** f*  THEN
+	    UNLOOP  EXIT  THEN  drop
+    LOOP
+    sfnumber ;
 [ELSE]
 : sfnumber ( c-addr u -- r true | false )
     >float ;
+: prefix-number  sfnumber ;
 [THEN]
 
 [ifdef] recognizer:
@@ -149,7 +163,7 @@ DOES> ( -- r )
     recognizer: r:fnumber
 
     : fnum-recognizer ( addr u -- float int-table | addr u r:fail )
-	2dup sfnumber
+	2dup prefix-number
 	IF
 	    2drop r:fnumber  EXIT
 	THEN